Gigachad Calculator V3.0

alert('🛠STARTING SCRIPT⚙️')
var button = document.createElement("Button");
button.innerHTML = "Procent af et givent tal (fx. 20% af 100 = 20)";
button.style = "top:5px;left:5px;position:absolute;z-index:99999;padding:15px;";
document.body.appendChild(button);
button.onclick = function(){
var number = prompt("Skriv tallet du vil tage en procent af:");
var percentage = prompt("Skriv den procentdel, der skal tages af tallet:");
var answer = number * (percentage / 100);
alert(percentage + "% af " + number + " er: " + answer + ".");
};
var button = document.createElement("Button");
button.innerHTML = "Find originale tal efter en stigning (fx. tallet et 120 efter en stigning på 20%, hvad var det originale tal?)";
button.style = "top:60px;left:5px;position:absolute;z-index:99999;padding:15px;";
document.body.appendChild(button);
button.onclick = function(){
var rise = prompt("Skriv stigningen i procent (uden % tegn):");
var number = prompt("Skriv tallet:");
var original = number / (1 + rise / 100);
alert("Det originale tal er: " + original);
};
var button = document.createElement("Button");
button.innerHTML = "Hvor meget har jeg sparet? (fx. et produkt koster 80kr, fordi der er et tilbud på 20 procent. Hvor meget sparer jeg, hvis jeg køber produktet?)";
button.style = "top:120px;left:5px;position:absolute;z-index:99999;padding:15px;";
document.body.appendChild(button);
button.onclick = function(){
var currentPrice = prompt("Skriv den nuværende pris på varen:");
var offerPercentage = prompt("Skriv hvor stort tilbudet er i procent (uden % tegn):");
var originalPrice = currentPrice / (1 - offerPercentage / 100);
var moneySaved = originalPrice - currentPrice;
alert("Du sparer: " + moneySaved + " på produktet");
};
var button = document.createElement("Button");
button.innerHTML = "Next update soon";
button.style = "top:180px;left:5px;position:absolute;z-index:99999;padding:15px;";
document.body.appendChild(button);
button.onclick = function(){
alert("comming soon!")};
var button = document.createElement("Button");
button.innerHTML = "Next update soon";
button.style = "top:240px;left:5px;position:absolute;z-index:99999;padding:15px;";
document.body.appendChild(button);
button.onclick = function(){
alert("comming soon!")};
var button = document.createElement("Button");
button.innerHTML = "Next update soon";
button.style = "top:300px;left:5px;position:absolute;z-index:99999;padding:15px;";
document.body.appendChild(button);
button.onclick = function(){
alert("comming soon!")};
var button = document.createElement("Button");
button.innerHTML = "Next update soon";
button.style = "top:360px;left:5px;position:absolute;z-index:99999;padding:15px;";
document.body.appendChild(button);
button.onclick = function(){
alert("comming soon!")};
var button = document.createElement("Button");
button.innerHTML = "Next update soon";
button.style = "top:420px;left:5px;position:absolute;z-index:99999;padding:15px;";
document.body.appendChild(button);
button.onclick = function(){
alert("comming soon!")};
var button = document.createElement("Button");
button.innerHTML = "Next update soon";
button.style = "top:480px;left:5px;position:absolute;z-index:99999;padding:15px;";
document.body.appendChild(button);
button.onclick = function(){
alert("comming soon!")};
var button = document.createElement("Button");
button.innerHTML = "Next update soon";
button.style = "top:540px;left:5px;position:absolute;z-index:99999;padding:15px;";
document.body.appendChild(button);
button.onclick = function(){
alert("comming soon!")};
var button = document.createElement("Button");
/////////////////////////////////////////////////////////////////////////////////////////////////
var searchField = document.createElement("input");
searchField.type = "text";
searchField.placeholder = "Skriv dit regnestykke her!";
searchField.style.border = "2px solid black";
searchField.style.borderRadius = "10px";
searchField.style.padding = "5px";
var searchButton = document.createElement("button");
searchButton.textContent = "Udregn";
searchButton.onclick = function() {
  var query = searchField.value;
  query = query.replace(/\s/g, "+");
  query = encodeURIComponent(query);
  var googleWindow = window.open("https://www.google.com/search?q=" + query, "Google", "width=800, height=600");
};
searchButton.style.border = "2px solid black";
searchButton.style.borderRadius = "10px";
searchButton.style.padding = "5px";
searchButton.style.marginLeft = "10px";
var searchDiv = document.createElement("div");
searchDiv.style.position = "fixed";
searchDiv.style.top = "70px";
searchDiv.style.right = "675px";
searchDiv.appendChild(searchField);
searchDiv.appendChild(searchButton);
document.body.appendChild(searchDiv);
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
var mathField = document.createElement("input");
mathField.type = "text";
mathField.placeholder = "Skriv en ligning her";
var mathButton = document.createElement("button");
mathButton.textContent = "Regn";
mathButton.onclick = function() {
  var problem = mathField.value;
  var link = window.open("https://www.symbolab.com/solver/step-by-step/" + problem, "?or=input", "width=800, height=600");
  window.open.href = link;
};
var mathDiv = document.createElement("div");
mathDiv.style.position = "fixed";
mathDiv.style.top = "150px";
mathDiv.style.right = "500px";
mathDiv.appendChild(mathField);
mathDiv.appendChild(mathButton);
document.body.appendChild(mathDiv);